In separate bowls, color half of the buttercream pink and the other half blue.

Using a spoon, hollow out a 1-inch well in the center of each mini cake.

For each cake, fill the wells with the buttercream, alternating colors.

Lightly frost each cake with white buttercream so the color underneath is hidden.

Put the cakes in the liners and chill for 30 minutes to let them set.

Each toddler will be given a cake and directed to smash it.