Just got this great email from my favorite Adventure Nephew - 4 years old and climbing REI's rock wall.

The take-away from this post should be, expose your kids to well supervized activities.  Get them out there they will surprise you.  We see kids all the time at the top of Mammoth on mountain bikes or in Moab or Sun Valley river rafting.  In the age of 'THINGS' kids remember experiences over things.  Do you remember getting your 2nd bicycle?  I do not but I certainly remember backpacking Mono Pass as a 10 year old. . .