Continue counting in jumps of 2's, 5's and 10's.
Continue counting forwards and backwards from any given number.
Green and blue group do this with numbers up to 30 and move to higher numbers when your child is becoming confident within these numbers.
Yellow and red group when confident counting forwards and backwards from any number to 100 try going beyond 100.
Say a number up to 10 and see if your child can tell you what it is when doubled. Can they tell you without counting? e.g. double 3 is 6, double 9 is 18 etc.