We only received a few ideas about this activity. Mason from Hanahauoli said:

I think 40 because it seems average in my head. 

I got around 65 adult strides.

Maya and Mia from Red Hill in England both had a go at the beanbag throw as well. Mia said:

I thought that I could throw really far but I threw really close.

Maya said:

I thought that I could throw 2 metres but I threw 3 metres.

Well done to all of you for making an estimate and then comparing your estimate to your real throw!