Dd is 5 just after Christmas. We've just entered tier 4 and I doubt very much that it will be lifted by her birthday to allow us to do much.
Birthdays are usually very family orientated, birthday tea party with all our family or a meal out. Maybe a day out with all the cousins to soft play or swimming. Nothing fancy but involves everyone we can't meet up with.
How have you made your dc's birthdays special during lockdown? Preferably stuff that doesn't cost too much if possible!