At what age do they start to....

[santakbaby]

Write their name or write any distinguishing letters

Ride a bike with no stabilisers

Both mine were 5 when they learned to ride their bikes. They were copying letters about 3, but all children are different.

ds2 is just 3 and can already write his name.

DS1 is 6 in April and can only ride with stabilisers and doesnt think he is ready to take them off yet!!

DD1

3

4

DD2

3

5

My youngest dd is 4 and is writing her name and copywriting well. She can't ride a bike without stabilisers.
The rest of my children - I really can't remember.