In case something is missing, please contact us at contact@circuitmess.com. Send us a photo of everything that came in the box, and we'll get back to you as soon as possible to resolve the issue.    Here's the list of components:  1. Stickers 2. Acrylic casings 3. Battery holder 4. Batteries (3) 5. LEDs (8) 6. Potentiometer 7. Connectors (2) 8. Resistors (3) 9. Capacitor 10. On/off switch 11. 555 timer (the smaller one) and 4017 digital counter (the bigger one) 12. Transistor 13. Bolts (12) 14. Metal screws (2) 15. Large standoffs (2) 16. Standoffs (12) 17. PCB 18. Wires (8)