Here is a variety of interactive fraction activities to reinforce fraction concepts.

Fraction Flags (halves and quarters)
http://www.oswego.org/ocsd-web/games/fractionflags/fractionflags.html

Fraction Flags (thirds)
http://www.oswego.org/ocsd-web/games/fractionflags/ffthirds.html

Fraction Paint (2 by 2)
http://www.oswego.org/ocsd-web/games/FractionPaint/fpaint4.html

Fraction Paint (3 by 3)
http://www.oswego.org/ocsd-web/games/FractionPaint/fpaint9.html

Fraction Paint (4 by 4)
http://www.oswego.org/ocsd-web/games/FractionPaint/fpaint16.html

Fraction Paint (5 by 5)
http://www.oswego.org/ocsd-web/games/FractionPaint/fpaint25.html

Fraction Paint (6 by 6)
http://www.oswego.org/ocsd-web/games/FractionPaint/fpaint36.html