Warm notice: this product can only be applied by people over 12 years old, and the experiments must be performed under the supervision of a teacher or parent Package includes: you will get 1 sets fruit battery science experiment kit, which include 4 pieces copper sheet, 4 pieces zinc sheet, 1 piece electronic clock, 3 pieces RGB LED, 3 pieces wire, 2 pieces wires with clip, 1 whole sets for you to apply Easy to operate: just follow the detailed assembly instructions (shown in the picture), and you need to prepare several fruits or vegetables, such as oranges, lemons, potatoes, etc. help to exercise students' practical skills Educational game: through an interesting fruit battery science experiment, students can explore and understand the mysteries and improve their hands-on ability, so that knowledge is no longer theoretical Multiple advantages: the process of fruit battery science experiment project with kids can create children's imagination, improve observation, increase scientific knowledge, and cultivate scientific invention hobbies 2 Sets fruit battery science experiment kit orange potato lemon battery physics teaching experiment with 2 pieces electronic clock educational toy for students Features: Happy and easy to learn: A wide variety of experimental materials can be found at home, oranges, tomatoes, potatoes, etc. suitable for both home and school. Functional game: Learn about electricity in an innovative way, also develop children's hands ability, observation, space cognition, stimulate children's intellectual potential. Specifications: Material: zinc, copper, plastic Size: approx.15 x 10 cm/ 5.9 x 3.9 inches in length/width Color: as pictures show Quantity: 34 pieces totally Package includes: 5 x Wire 2 x Crocodile clip 4 x Copper sheet 4 x Zinc sheet 3 x LED 1 x Digital clock Note: Children's playing must under parental or teacher's supervision. Suitable for people over 12 years old. (US) Suitable for people over 14 years old. (Europe)