Blends

bl	cl	fl	gl
pl			sl
br	cr	dr	fr
	gr	tr
st	sp	sw	tw
	sc	sl
	sm	sn
scr	spr	str	spl

http://www.phonicsworld.com/Consonantblends.html

http://pbskids.org/lions/games/blending.html

http://www.bbc.co.uk/schools/wordsandpictures/clusters/blender/game.shtml