Karl likes Joy Ultra, but you can try any as long as it doesn't have Bleach or antibacterial properties. You can also add some commercial bubble solution to increase the staying power of the bubbles. Just add and gently stir. Glycerin and other additives are used to slow evaporation. Use sparingly, if desired. He recommends CricketHillToys.com for Bubble wands at about $7.00 each. Buy extra handles in case some break. (I plan to build a large circular one with parts from Home Depot).