Description: "Activate an attached standard 1/8"" (3.5mm) switch (must be checked out separately) into the switch adapted cement mixer truck to watch loads of bubbles pour out of its rear compartment. Children of all ability levels can take turns activating the bubbles and playing with them. Requires 2 AA batteries (not included). Bubble solution not included. Note: Must request capability switch separately. Adult supervision required. Choking hazard for children under age 3."