A big sister cut these base ten cards for these two to play war with. (its all linked up on the pinterest page – button over to the right sidebar)  It wasn't much of a stretch for Brendan obviously but they are all really good about playing with a sibling.  We have also used flash cards and given an older sibling a harder set of facts so the playing field is level.  Whoever has the highest answer on the card collects. 

I don't love the graphics on these printables but it was a hit for obvious dental reasons. <g> Tess, at 5, is losing a lot of teeth already.  She loved this game. The graphic has ten teeth.  You black out however many you are subtracting from ten in your math problem.  

Usually they complete a regular math book page and then quite happily spend another 15-20 minutes playing more math games. 

We made a DIY version of this activity years ago but it was a little wonky due to slight variations in the cuts in the wood made by hand.  When I was at the craft store this bucket of dowels in assorted widths caught my eye.  Since it was discounted and we have no power tools with us I grabbed it up.  Abbie spent a long time this morning sorting and making dowel trains.  It requires careful comparing to sort the narrower widths.  Much less expensive than Montessori sensorial materials and my heart won't break if one goes missing. Eventually one will. ; )