Educational toy with a time attack function to improve mental calculation skills. - Brand: SONIC - Model Name: pico-train! - Function: Mental calculation drills - Target Age: Before elementary school entrance - Features: Time attack function - Game Function: Dynamic game - Batteries Used: AAA batteries This was a gift, but I already have one, so I'm selling it. I have the sales certificate, but I don't have the receipt because it was a gift. Thank you for looking.