Gift for twin children

My friend birth the twin children. One is a boy and the other is a girl. She invited me to their one-month celebration and for this, she planned a party. I cannot decide about a gift that's why I am here for some suggestions on which gift will remain best for twin children. Waiting for your fast reply...

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Well, Anyway, I am single so I have no idea about it. After searching on Google. I collect this information which I will share with you. Personalised Twins Dressing Gowns With Ears
Twins Milestone Cards
Personalised Twins Story Book
Double pack of bibs
Nursing pillow for twins
I hope so this suggestion is best for a gift.