We usually just use beans or pebbles for the basic math facts. Straws or toothpicks rubberbanded together for grouping 10’s and 100’s works well too.
I do find a movable clock to be helpful esp when they are having to learn about “crossing” the hours (ie starting at 10:20 and adding 1 hour and 45 minutes). I have also found fraction circles to be helpful (although you could make these-I just happened to get a really good deal at a garage sale).
HTH,
Rebecca