We have had a solution to this problem from Rebecca in Colchester. She says:
Kimie needs 3 sticks, Sebastian needs 2, the line is 6 altogether.
Other solutions are:
Kimi 6, Sebastian 4, Length 12
Kimi 9, Sebastian 6, Length 18
Kimi 12, Sebastian 8, Length 24
Alistair from Histon and Impington Infants School said:
Yes they can make their lines the same length. Kimie could use three sticks for Sebastian's two. They would both make a line six cubes long. They can make other lines the same length. These will be in the 6 times table.