All components are through-hole, making this Simon kit great for beginners.
Reviewer Thomas O’Brien from San Antonio writes: “The instruction booklet is very well written and goes step by step with clear explanations. My grandson Ben, 5, helped put components in the holes of the circuit board, then I soldered them, and he clipped the wires. He likes working with the magnifier to see what’s going on, while I solder. I showed him how to insert batteries correctly (look for the plus sign). The kit went together without a hitch and worked the first time. Grandma, look what we made! Thanks for a nice, well-designed kit — an easy one that a youngster can help build.”