PicassoTiles 4 Piece 3" x 3" Blue Square Magnetic Tiles

I grabbed these to expand my kid's existing tile collection and the magnets snap together just as firmly as the ones that came in the bigger set. The 3x3 size is great for filling gaps when building towers and castles.

These little 3x3 squares are perfect for filling gaps when we're building. The magnets hold strong enough that my toddler doesn't knock everything down, and they click together satisfyingly. We've already ordered more to expand our towers.

My kids used these blue squares to extend their castle walls—the magnets are strong enough to hold the structure steady. The 3x3 size is perfect for small hands to click together easily.