TLDR: I built a portable step-sequencer synthesizer for my daughter’s third birthday. It has four sliders that control four notes in a looping sequence. Slide up = higher pitch, slide down = lower. It includes: An onboard synth module + speaker Tempo, volume, scale, pitch, and instrument controls An OLED screen with visual feedback + a dancing panda A custom PCB and 3D-printed enclosure It's a chi

