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Harlan Cru Play
Harlan's field lab

Small builds.
Big questions.

Real things to make, test and wonder about. Bring a grown-up and your curiosity.

Project 02 / Electronics + sound

Small parts. Big sound.

Harlan's completed wooden two-speaker Bluetooth build

A Bluetooth speaker and an FM radio, assembled from a kit. Explore the build photos, watch the silent demo and replay its frames.

Explore Radio Lab
Project 01 / Magnetism + 3D printing

A pet made from magnetic sand?

Harlan's orange printed habitat and blue base with dark magnetic grains

Collect tiny magnetic grains. Print a habitat. Watch a magnet make your pretend pet move, then investigate why.

Explore the project
Watch + explore

Big Top: light + motion

Watch the CrunchLabs strobe-light animation and the Big Top follow-up from the channel.

Watch the science videos