We were hoping that this set could be used with Lego DUPLO blocks as this set contains very few pieces; However, this set does not work with DUPLO blocks. It's a nice set but very cheaply made and a lot smaller than the pictures show - the black baseplate is 4" by 4". Also, I wouldn't use this on toddlers, the plastic balls are only about 3/4" in diameter and can be a choking hazard.
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