I'm thinking of different blocks on a lap quilt.... an envelope to open and find loosely strung wooden and plastic beads on a cord that is attached inside so it is not lost. a block with a zipper that reveals some i spy type fabric. a block with tabs that button on multicolored buttons. I think the apron is a good idea so that it does not slide off while the activities are being done... it can be made with various quilt blocks the same as a lap quilt. Please show us what you come up with.