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Take your time — nothing here can go wrong, and you can always try again.
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Inner Planets
Take your time — nothing here can go wrong, and you can always try again.
Full screen — no distractions
Frequently Asked Questions
- What is "Inner Planets" and how do you play it?
- Inner Planets is a free, interactive science game designed for 5th Grade students. Sort planets and planet facts into the inner rocky planets and the outer giants. It supports 1 player(s), takes about 10 min, and is rated easy difficulty.
- Is this game free to play?
- Yes — Inner Planets is 100% free with no signup required. Just open the page and start playing instantly in your browser on any device.
- What age or grade level is this game for?
- This game is designed for 5th Grade students. The science content is curriculum-aligned for 5th grade level, making it a great supplement to classroom learning.
- Can my child play this game on a tablet or phone?
- Yes. All LittleActivity games work on any device — desktop, tablet, or phone. No app download needed; games run directly in the browser.
- What science skills does this game cover?
- Inner Planets covers 5th grade science skills through interactive gameplay. It builds problem-solving, critical thinking, and subject fluency in a fun, no-pressure environment.
More 5th Grade Science Games
The Solar System
Order the planets by distance and by size.
easy10 min
Objects in Space
Wire space words — dwarf planets, light-years, constellations — to their meanings.
easy10 min
The Sun and Stars
Read about the Sun and other stars and tap the sentence that proves each answer.
easy10 min
The Water Cycle
Follow water through evaporation, condensation, precipitation, transpiration and runoff.
easy10 min
Series and Parallel Circuits
Predict what happens to the other bulbs when part of a series or parallel circuit breaks.
easy10 min
Food Webs
Wire each role in a food web to an example.
easy10 min