You can get them at stevespangler.com for 12.99 or something like that
Chat with our AI personalities
The jelly marbles are made and sold by Steve Spangler Science. They are $10 for about 1000 marbles (50 g) and kit. See related link "Jelly Marbles" for more information
He will have 13 blue marbles and 10 green marbles.
12 blue marbles
24
The fraction is 3/15.