Stick to your list of ten and put on an activity party with a couple of organised tables of things to do. These things can then be what goes in the party bag if you're doing them. Go for a theme if it helps your thinking but do the same activities regardless e.g. a sparkly party, arty party, purple party or whatever.
Set up the activities before the children arrive and if possible, have an adult or local teen 'leading' the activity. The format I used for years was similar to this, with activity 1 starting as soon as the first child arrives so there isn't lots of hanging around.
Activity 1: mask decorating.
Buy a set of masks from BakerRoss or Hobbycraft, gather stickers, sticky paper, tissue paper and coloured paper that fits with your theme, put it in the middle of the table and encourage them to cover as much of the white of the mask as possible. Write their name on the mask ASAP and if they don't wear it, put it straight into the party bag.
Activity 2: cake/biscuit decorating
Buy fairy cakes or bake biscuits in a number 4 shape, give each child a paper plate with their name already on it and provide icing tubes, sprinkles and other decorations that fit with your theme. Let them decorate 3 or 4 items which are then put aside to dry... and go into the party bag later/get taken home on the paper plate.
Activity 3: pass the parcel (main prize goes into winner's party bag).
Self-explanatory hopefully. Whilst this is happening, get your helpers to organise the mask activity table and repurpose it ready for after food.
Activity 4: eating!
Have this set up beforehand with savoury bits, plates and cups laid out. Is an ideal opportunity for a themed tablecloth or napkins if that's your sort of thing. Get helpers to pour drinks once children have sat down and to bring out sweet things slowly. Do birthday cake and candles at this point but don't eat it yet.
Activity 5:
Back to the table used for activity 1 to do another craft from BakerRoss or Hobbycraft e.g. cardboard frame decorating, crown/tiara decorating or similar. You could do spoon people if you've got fabric scraps and pipecleaners lying about the place but maybe save that for next year. Parents collect from this activity, creations go into party bag along with a piece of birthday cake which one of your helpers will have cut and wrapped whilst another has made a start on clearing the food.
If you have space to store the arty scraps, you'll be able to bring these out for years! Stick on gems, multi packs of washi tape, sticky backed shiny paper, textured paper, cheap packs of patterned paper from B&M (or bits of themed wrapping paper) look surprisingly effective on small children's craft projects and aren't pricey.