So apparently bubbles are out of season right now. I went to Hobby Lobby however, and found this pack of 24 small party bubbles.
Pop off the top and if the bottle is really full, you will need to pour out a small bit so there is room for the dye. Then, drop in a few drops of food coloring or liquid watercolor (both work). Then, add a little bit of dishwashing soap to make it more bubbly.
Then blow the bubbles with the wand like you normally would. Let the bubbles drop on the paper. The ones that turn out really well are the bubbles that land on the paper, sit there for a little while and then pop. The extra splatters look really cool too!
Affiliate Link: I love these toys for young kids!