Triple Party Invite - Present Buying

[Getmeoutofhere2019]

My 3 year old has been invited to a party with three names on the invitation.
Only one of the names I've heard before so I'm guessing he doesn't play with the other two.
My question is, do I buy 3 presents or just one for the child we know. I would usually spend around £10 per present, but this would be a super expensive party.
What would you do ?

3 presents but just go for a book or something

3 small presents: hot wheels car, small book etc. As you don't know the children I would buy them all the same thing.

I'd spend a fiver on each. The Works can have some nice stuff for 2 for £10 (leaving a spare for the next party).

3 small presents

3 presents, you can't leave out two of the children because you don't know them. Just get them something small , maybe spend a bit more on the child you know. A Party between 3 is odd though I think.

Oh sorry you don't know them, have just heard the name. Yes get 3 small gifts, I agree with the works, awesome place!

Great ideas .. thank you ... i was just overthinking it .... I've managed to get some great presents for all three children from the works..... Thank you everyone :-)