12-18 years

Telescope in the pocket

Dificuldade: ★

Making your own sky disk

Dificuldade: ★

Form the armillary sphere to the astrolabe

Dificuldade: ★

The pyrenean shepherd’s dials

Dificuldade: ★

Building simple sundials

Dificuldade: ★

Latitude Gnomon and Guadrant for the Whole Year

Dificuldade: ★

Making helioscopes with four sticks

Dificuldade: ★