Using simple 'Animate Item' and 'Show/Hide' interactions to have the boxes disappear and realign accordingly. Can be used as a base on how you can build notifications or lists to realign themselves.
Lets babies mix and match and make all kinds of silly halloween characters.
Images from: https://www.comofazeremcasa.net/brinquedo-com-blocos-de-madeira-para-criancas-com-moldes/