Entertaining older kids at first birthday

[seeyouinanotherlifewhenwearebothcats]

Posted this in parenting but think this is the right board. My dd is 1 soon. Planning to have a fairly low key party at home. What do people do for older DC to keep them entertained? I have older kids 6 and 4 and cousins who are older again. Unlikely to be good weather outside to do anything in the garden. Thanks in advance for any ideas 🥳

I'd expect the older ones to just play with each other, maybe have a craft activity or two available so they can sit down and do something if just playing isn't going too well.