There are two ways to create the platform for your glow stick archway: cutting it out of cardboard, or using a laser cutter to create an acrylic piece that will hold the ends of the glue sticks firmly in place.
Below are instructions for a cardboard version, which requires only some cardboard, paper, glue, and a good hobby knife.
On this NeoPixel strip, the red wire is +5V, the middle wire is data, and the other edge wire is ground.
Using alligator clips from the pads on Circuit Playground Express, connect the red wire to Vout, the middle wire to A1, and the edge wire to GND.
To power your NeoPixel Dot strip, just connect a battery to the JST port on Circuit Playground Express and you should see it boot up after a second or two.