Use a screwdriver to unscrew the battery compartment cover and insert 4 new AA size (1.5 V) batteries (included) according to the instructions as shown in the battery diagram. Pour bubble solution into the bubble machine reservoir. Turn on/off the bubble machine. After playing, remove the remaining bubble solution from the reservoir and use a dry cloth to clean. Battery Information: always replace all batteries at the same time. Alkaline batteries are recommended for best performance. Do not use rechargeable batteries. Non rechargeable batteries are not to be recharged. Different types of batteries or new and used batteries are not to be mixed. Only batteries of the same or equivalent type as recommended are to be used. Batteries are to be inserted with correct polarity. Exhausted batteries ate to be removed from the toy.