Expand foundational unit block sets with just the pieces your builders need more of. Made to align with the same mathematical dimensions as traditional unit blocks, these add-on sets are designed to be used as an enhancement to foundational sets.
My kids kept fighting over the half-size blocks, so adding these 16 pieces basically solved the shortage overnight. They line up perfectly with our old unit blocks, no wobble or odd sizing. Now the tower building actually goes somewhere.
My kids keep grabbing the same handful of blocks during builds, so this add-on set is exactly what we needed. The pieces line up perfectly with our existing unit blocks, and having 16 extras means two kids can finally build towers at the same time without fighting.
My kids constantly fight over the half blocks during builds, and this set finally gives us enough to go around. They match up perfectly with our existing unit blocks, so towers and walls stay level without any awkward gaps. Exactly the expansion we needed.