Yes you can; as a parent, you do what you feel is best for your child.
I would think that would be ok but...
solution or mixture
No but you can use glue and powdered sugar or a mix of water Epsom salt then add that to glue or mix baby powder toothe paste Epsom salt and water together 😉😉
Yes
Whip with a fork in a bowl.
powdered drink mix is a mixture. ☺ :D
"solution" or "mixture"
saturated
yes
mix it with water
You should feed it every 2 hours on powdered baby milk. After about 3 weeks add a bit of rusk to the mix to give it something more solid.
put lavender in powder and mix it together.
Before mixing you have, of course, separately sugar, water and drink mix.