My four-year-old enjoys all the "things" during bath time. Tub crayons, bath bombs, lots of bubbles, we use them all. I thought these would be a fun new thing to try, and they were a hit. They make a fun crackling noise, similar to pop rocks (but don’t eat them!). The colors are fun, and they don’t have an overpowering scent. They didn’t leave any residue in the tub, so they’re a win all around for me.