Put kids in front of a pile of Kapla blocks and watch their imaginations and engineering ingenuity run wild. The beauty of this toy, designed by an architect as a building tool, is its versatility. One day kids can see how high they can make a tower, another day they can make a staircase to a castle, or a sprawling farm. Children don’t outgrow their Kapla blocks: older kids and even adults enjoy trying to build the intricate creations pictured on the outside of the box.