Sound like fun? Here's how to get involved...
1. See the list
Download the full list, or take a look at the first few activities in the photo album below.
2. Take part
You can join in on the day, or take inspiration from the full list whenever you like.
In need of inspiration? These partners can help.
3. Keep sharing
Remember: share what you do online using #70things - and see what everyone else has done.
So, take a look at the full list or explore this week's activities below.
Get stuck in – and have fun!