Learning to ride a bike is not just for children. If you're an adult and you don't yet know how to ride but you would like to then there are lots of courses available. Once you've learned how to ride you might also want to do a basic bike maintenance course so you know how to fix a puncture and look after your bike.
There are FREE courses available from Bike Right to teach you how to ride a bike. They provide you with a bike and helmet for use on the course too! More details here.
It's also worth checking with local organisations. For example, Transport for Greater Manchester also offer free bike courses. More details here.
Happy cycling! :)