Brand NEW- received as a present, but my 11-year-old already had one. NEVER OPENED Learn by doing with Snap Circuits®! Snap Circuits® Jr. allows for hours of educational fun while learning about electronics. All parts are mounted on plastic modules and snap together with ease. Electrical components provide students ages 8+ with hands-on experience designing and building models of working electrical circuits. Snap-together parts require no tools and ensure correct connections Includes 30 parts, and instructions for over 100 projects Requires 2 "AA" batteries (sold separately) Clear and concise illustrated manual included and available online