3-11 years
Saturn: lord of the rings 2
困难: ★
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Saturn: lord of the rings 1
困难: ★
Icosa planet
困难: ★
Dust in the universe
困难: ★
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★
Observing the Moon
困难: ★
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★
Shadow play
困难: ★
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★
The Earth is round
困难: ★
Solar system model demo
困难: ★
Modelling the night sky
困难: ★
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★
Making a rainbow
困难: ★
Magic levitation
困难: ★
Demonstrating light pollution
困难: ★
Center of mass demostration
困难: ★
Spicy Solar system
困难: ★
Earth a ball
困难: ★
Black hole
困难: ★
As the world turns
困难: ★
The Sun in the local horizon
困难: ★
Solar motion demostrator
困难: ★
How to build a big plywood demonstrator
困难: ★
Projection camera for eclipse viewing
困难: ★
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How to make a Solar filter
困难: ★
Refractory telescope
困难: ★
Telescope basis 2
困难: ★
Telescope basis
困难: ★