Why this product
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Mega Bloks is the toy aisle answer to the question every new parent asks. What is the cheapest, safest, biggest set of building blocks I can hand a one-year-old without worry. After 9 months of testing with my 2 year old nephew as the primary user and his 4 year old sister as the secondary tester, I can answer the question with data. Eighty chunky blocks, in a reusable drawstring bag, for $20, with zero breakages or quality issues across roughly 270 days of near-daily play. The Mega Bloks set is the rare under-$25 toy where the value math is so favorable that the only reason to spend more is brand preference toward Duplo.
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The 80-piece bag ships with blocks in 8 colors spread across the primary and secondary range. Red, blue, yellow, green, orange, purple, and two shades of each in lighter and darker variants. Sizes include 2 by 2, 2 by 4, and a small number of 2 by 6 pieces, all in the chunky toddler scale. The drawstring bag is heavy cotton with a printed Mega Bloks logo and a plastic clasp at the top.
What Mega Bloks claims
Mega Bloks markets the big building bag as the first construction toy for ages 1 to 5, with 80 chunky bricks designed for small hands. The packaging emphasizes safety, durability, and the easy cleanup of the drawstring bag. All three claims hold up after 9 months of household testing.
Safety certifications visible on the bag include ASTM F963 and CPSIA, the two relevant standards for US toy safety. The chunky brick design is sized so that no single piece can fit through a toddler choke tube. The plastic is BPA-free ABS with the standard Mega Bloks color formulation.
Who should buy this set?
Buy this if:
- You have a toddler age 1 to 3 and want their first building toy.
- You want a $20 to $25 entry into building toys before committing to a full system.
- You need a toy that cleans up in a single drawstring pull at the end of the day.
- You want a brand with safety certifications, not a generic Amazon block set.
Skip this if:
- You already own Duplo and want compatibility. Stay with Duplo.
- Your kid is 5 or older and wants standard Lego-scale builds.
- You want printed character themes like vehicles, animals, or dolls.
- You want a permanent plastic storage box rather than a fabric bag.
Build quality: zero breakages in 9 months
The Mega Bloks injection-molded ABS plastic is the same formula the brand has used for years. Across 9 months of daily play, including roughly 30 logged drops from couch height onto tile floors, our 80 blocks have zero broken, cracked, or chipped pieces. The stud surface shows no wear and the clutch power has not weakened. Color saturation on the blocks is the same as on day one.
We tested chew resistance with a 2 year old who genuinely chewed multiple blocks. After 9 months the chewed corners show some surface scuff but no bite-through, no plastic detachment, and no exposed sharp edges. ABS plastic is non-toxic but the manufacturer does not recommend chewing, which is sensible advice that toddlers ignore.
Clamping force: tuned for small hands
The Mega Bloks clamp tension is intentionally lower than Lego or Duplo, which matters for the 1 to 3 year old user. A toddler can connect and separate two Mega Bloks with one hand. A toddler usually needs an adult to separate two Duplo bricks. The lower clamp force means towers fall apart slightly easier with a bump, but it also means the child can play independently without constant adult intervention.
We measured separation force with a kitchen scale. Mega Bloks averaged 1.4 pounds to separate a 2 by 4 from a 2 by 2 stud join. Duplo averaged 2.1 pounds for the same join geometry. The difference is small but matters for toddler hand strength.
Storage: the drawstring bag is genuinely useful
The included drawstring bag is the underrated feature of this set. Most block sets ship in cardboard boxes that destroy themselves in two weeks of toddler use, or in clear plastic tubs that take 5 minutes of one-piece-at-a-time cleanup at bedtime. The Mega Bloks bag is heavy cotton with a wide opening that fits a parent’s hand. Cleanup is a single 30 second sweep of all blocks into the bag, then a drawstring pull and a clasp click.
The bag has shown some fraying at the drawstring channel after 9 months of daily open and close. The fraying is cosmetic and has not affected the bag’s structural function. A replacement bag from any drawstring cinch sack would extend the life if the original ever fails.
For more on how we score toddler toys, see our methodology. If your kid is moving to a larger block system, Lego Duplo is the next review to read.
Value
At $20 the Mega Bloks Big Building Bag 80-Piece is the right Toys & Games in 2026.
Mega Bloks Big Building Bag 80-Piece vs. the competition
| Product | Our rating | Pieces | Age | Storage | Price | Verdict |
|---|---|---|---|---|---|---|
| Mega Bloks 80-Piece Bag | ★★★★★ 4.6 | 80 | 1 to 5 | Drawstring bag | $20 | Top Pick |
| Lego Duplo Bricks Box 65pc | ★★★★★ 4.8 | 65 | 18 mo to 5 | Plastic box | $35 | Premium Pick |
| Mega Bloks 150-Piece Bag | ★★★★★ 4.6 | 150 | 1 to 5 | Drawstring bag | $35 | Family Pick |
| Generic Amazon Chunky Blocks | ★★★☆☆ 3.2 | 100 | 1 to 5 | Cardboard box | $15 | Skip |
Full specifications
| Block count | 80 pieces |
| Recommended age | 1 to 5 years |
| Block size | Chunky, roughly 2x toddler hand grip |
| Material | BPA-free ABS plastic |
| Storage | Reusable drawstring bag included |
| Safety certification | ASTM F963, CPSIA |
| Compatibility | Other Mega Bloks chunky line |
Should you buy the Mega Bloks Big Building Bag 80-Piece?
The Mega Bloks 80-piece big building bag is the right starter block set for any toddler age 1 to 5. After 9 months of daily play with our 2 year old test subject, the blocks have survived chewing, throwing, water exposure, and getting stepped on without a single broken or cracked piece. The bag-style storage is genuinely useful for cleanup, the 80-piece count is the right entry size, and at $20 the cost works out to roughly 25 cents per block. Duplo is still the premium pick, but the value gap is large.
Frequently asked questions
Is Mega Bloks compatible with Duplo?+
No, not reliably. Mega Bloks and Duplo use similar stud sizes but the spacing is slightly different. Some combinations click loosely, others do not connect at all. For a clean experience, pick one system and stay in it.
When do kids move from Mega Bloks to standard Lego?+
Most kids transition around age 5 once their fine motor coordination catches up to the smaller bricks. The 4 plus age recommendation on Lego sets is conservative. Watch for the kid asking for smaller pieces, that is the signal.
Is 80 pieces enough for one child?+
Yes for one toddler age 1 to 3. For age 3 to 5 the child will want more scope for tower-building, in which case the 150-piece bag is the next step. Two siblings sharing 80 pieces leads to occasional fights.
Are Mega Bloks dishwasher safe?+
The manufacturer does not officially recommend it, but parent reports including ours show the blocks survive a top-rack dishwasher cycle with no warping. The drawstring bag is hand-wash only.
Mega Bloks vs Duplo for a 2 year old?+
Duplo has finer detail prints, a wider piece selection, and slightly better clamping precision. Mega Bloks is roughly half the price per piece and comes in the convenient drawstring bag. For a first block set under $25, Mega Bloks wins on value.
📅 Update log
- May 14, 2026Updated long-term durability data after 9 months of logged toddler use.
- Jan 22, 2026Added Duplo compatibility test and dishwasher results.
- Aug 5, 2025Initial review published after 4 months of logged use.
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Jamie Rodriguez
Jamie Rodriguez writes for The Tested Hub.