12-18 years

Telescope in the pocket

Difficulté: ★

Making your own sky disk

Difficulté: ★

Form the armillary sphere to the astrolabe

Difficulté: ★

The pyrenean shepherd’s dials

Difficulté: ★

Building simple sundials

Difficulté: ★

Latitude Gnomon and Guadrant for the Whole Year

Difficulté: ★

Making helioscopes with four sticks

Difficulté: ★