PicassoTiles’ magnetic marble run sets combine two of my favorite kinds of toys for kids: marble runs and magna-tiles.

Based on that info alone, I’m sure you can guess how it works — constructing marble run towers using magnetic tiles and track pieces, through which you can propel a series of specially made weighted magnetic marbles. I like that those marbles are oversized, and thus less likely to be choking hazards.

The sets come in a few sizes: 50-piece, 70-piece, 100-piece, and 120-piece.