Just because everyone is dressed formally doesn't mean you can't use humour!

If you go with a paint store gift certificate, wrap two big paintbrushes in a box with the gift certificate in an envelop on top of them. You might see if you can have their individual names and the wedding date engraved on each handle!

Or - go with a gift cert for a baby supply store, and put a baby's outfit or t-shirt with a funny or loving saying on it! Or again - their names and wedding date! (would be hilarious for the baby to wear! Neutral colour like yellow, unless they know if it's a girl or boy).If they truly are good friends - I think your husband might think combining a gift certificate with a 'sample' of what's attached to it is okay. See what he thinks.