My son was playing with our Ipad2 and dropped it. At first it was a small crac, now it is starting to spiderweb over all the screen can i purchas a Touch Screen Glass Digitizer Replacement Adhesive Glue Tape 3M for Apple iPad 2 and replace for cheaper

Any repairs not done by an authorized apple service center will void the original warranty.

A $6.95 shipping fee will be added if service is arranged through Apple and requires shipping. All fees are in US dollars and are subject to local tax. Certain damage is ineligible for out-of-warranty service, including catastrophic damage, such as the device separating into multiple pieces, and inoperability caused by unauthorized modifications. However, an iPad that has failed due to contact with liquid may be eligible for out-of-warranty service.
Apple reserves the right to determine whether or not your iPad is eligible for Out-of-Warranty service. Replacement iPads have a 90-day limited hardware warranty or assume the remainder of your standard warranty or AppleCare service contract coverage, whichever is longer. Please see the AppleCare+ for iPad and Apple Repair Terms And Conditions for further details.

You could get and install a screen protector. Will help hold the glass in place and protect from cuts.

The standard 1-year Apple Care warranty only covers defects in materials and workmanship, not damage due to accidents.

Apple's Limited Warranty http://www.apple.com/legal/warranty/ for iPad excludes coverage for damage resulting from accident, disassembly, unauthorized service and unauthorized modifications.

Out-of-Warranty Service

If you own an iPad that is ineligible for warranty service but is eligible for Out-of-Warranty (OOW) Service, Apple will replace (Apple doesn't repair) your iPad with an iPad that is new or equivalent to new in both performance and reliability for the Out-of-Warranty Service fee listed below. (The replacement will most likely be a refurbished iPad in a brown box, however, it has a new screen, back and battery.)

A $6.95 shipping fee will be added if service is arranged through Apple and requires shipping. All fees are in US dollars and are subject to local tax.

Certain damage is ineligible for out-of-warranty service, including catastrophic damage, such as the device separating into multiple pieces, and inoperability caused by unauthorized modifications. However, an iPad that has failed due to contact with liquid may be eligible for out-of-warranty service. See http://support.apple.com/kb/index?page=servicefaq&geo=United_States&product=ipad

Make a Genius Bar Reservation

http://www.apple.com/retail/geniusbar/

You may can get the iPad repaired at 3rd party repair sources for less $, however, any remaining Apple warranty will be voided.

iPad Repair & Screen Replacement Services

http://www.ifixyouri.com/16-ipad-repairs

RepairZoom iPad Repair

http://www.repairzoom.com/ipad-repair.html

Mission Repair

http://www.missionrepair.com/Apple_iPad_Repair_Services_s/431.htm

iGadgetResQ

http://www.igadgetresq.com/ipad-repair/

 Cheers, Tom 😉