secret keychain for him/her or friends

cults3d

best for surprising him/ her with secret gifts , made on fusion 360 the main hidden book type hinged box is inside a tpu cover which is attached to a keyring the box opens up only after taking out the cover which is why its hidden to normal sight , the inside is a 2 faces on which either photos can be attached by sticking or adjusting a small lithophane is a also a treat using 3d builder or any other app .