I am putting together a basic electronic hobby kit for my friend's son who is 10 years old. I am including 2 555 timer chips, 10 each of about 10 different values of resistors. 3 each of 2N3904, BC547, BC557 transistors, 5 each of several values of common capacitors, a 5K and 10K pot. 5 green, 5 red, and 5 yellow LEDs, 1 1602 LCD display a bread board and a bag of jumpers. Also including one of my old Multimeters. I'm putting several electronic eBooks on a flash drive for him. I think this should get him started. What am I leaving out?