Solar system planets and sun

My eight year old had a project in school about our solarsystem, so we decided to print out the planets according to his teachers guidelines, and made a quick design in Tinkercad using half spheres with a thickness of 2mm

You can find the instructions in Dutch in a picture, but to give a quick try in English.
Here are the diameters.
- Sun 14cm
- Mercury 2cm
- Venus 2,4cm
- Earth 3cm
- Mars 2cm
- Jupiter 8cm
- Saturn 5cm
- Uranus 4cm
- Neptune 4cm
- Pluto 1cm (Yes we know about that Pluto-thing)