Description: Material: The busy board accessories are made of high performance material, durable, and environmentally friendly. Application: Perfect early learning toys, and teaching aids, develop interest, exercise hand eye coordination, fine motor skill, and cognitive ability. Design: Sensory board toy parts feature fine workmanship, and exquisite details, adopt manual gear shape, smooth edges, not hurt hand, convenient to use. Wide Usage: Practical busy board DIY materials, suitable for kindergarten, nursery, preschool, and any other learning activities. Gift: Excellent gifts, party favors, and festival present for girls and boys. Size Chart: Pull Switch Length: 18.5cm/7.28in EU Adapter: 6.5cmx6.5cm/2.56inx2.56in 5 Holes Adapter: 8.5cmx8.5cm/3.35inx3.35in 3 Holes Adapter: 8.5cmx8.5cm/3.35inx3.35in Single Switch Size: 8.5cmx8.5cm/3.35inx3.35in Three Ways Switch Size: 8.5cmx8.5cm/3.35inx3.35in Package Includes: 1 Busy Board Accessory  Note: 1.This is not infant toy, please take away from children to avoid eating. 2.Please allow slightly errors due to manual measurement and different monitors.