Running, jumping, climbing trees... in a sense, taking on a challenge to raise funds for Sarcoma UK is a little like being a kid again.
You get to go on an adventure, do new things with your limbs and meet all sorts of new people to get into mischief with.
But this time, people will praise you and give you money.
We salute all of those big kids who push their bodies and minds to extremes in order to change lives of those affected by sarcoma.
Whatever challenge you take on, let us know about it. (We won't be able to kiss your grazed knee better, but we'll certainly send you a fundraising pack.)