Take a moment to review the components in the circuit diagram. This illustration is meant for referencing wired connections - The length of wire, position and size of components are not exact.
Black and Red wires will connect to the number 2 labeled terminals.
The 3xAA battery case connects to the Power input on the Crickit.
UV NeoPixel Strip:
The UV NeoPixel strip connects to the NeoPixel terminal. Din on the NeoPixel strip connects to the arrow icon on the terminal on the Crickit on the Crickit. GND connects to GND and 5V to 5V.
Side Light LED Strips
The Handle and End Side Light NeoPixel Strips connect to the A2 and A3 pads on the Circuit Playground Express. Both will share the 3v and GND pads. A single Breadboard NeoPixel will connect to the end of the Handle Strip.
Two Buttons can connect to the A6 and A7 pads on the Circuit Playground Express. Both will share the second Ground pad.