Materials for patching a tube:

Cement Glue - $1.99
Popsicle stick - Pack of 50 for like $.99
pack of sand paper - $4.99
Rubber Patches - $2.99
Pack of matches and a pencil or ask your parents and let them help you - $.50
Total: $11.45  USD

You will also be good for about 50 times for under $12! This will save you alot of money on tubes and it is easy!

How to patch a tube:

Step 1: Pump up your tube. Run over to some water and then find where all the bubbles are coming from. Put your finger over where its coming from and then dry it all off.
Step 2: Sand down that part really good with your sand paper. Make it really rough this is what you want!
Step 3: Put the cement all over around your puncture, make around a 1 inch radious around it.
Step 4: Strike the match, then put it on the rubber cement, then blow it out right away, do this 1 more time and blow it out fast!!! If you let the fire sit their for atleast 5 seconds then the tube will burst and you will hear a huge poping noise. from personal experience. but I have mastered it now!(NOTE: BE VERY CAREFUL! IF YOU ARE NOT CONFORTABLE DOING THIS THEN LET A PARENT OR ADULT HELP YOU!) Also the reason you are doing this, is it makes the cement SUPER sticky! Which means it will mold itself to the tube and its new patch!!
Step 5: Right away put the rubber patch on it. Then with your pencil roll over the patch and make sure it is nice and stuck on their.
Step 6: Put baby powder over the patch and around it so it isn't sticky and get stuck inside the tire. 
Step 7: Don't even wait a minute you are free and ready to go! Right when you put that patch on your cement, tube, and patch all molded theirselves together and they are not coming apart EVER!!!

Their you go, do all of those tricks, it will only take 5 mins max if you do it all right, and I bet you that you will be very happy and you saved yourself alot of money instead of buying a new tubes everytime yours popped! :)

Also I would like to add is put baby powder all over the tube, especially around the patch and all inside your tire after you have instected it, that way when you ride your tube won't get stuck inside of your tire the next time you need to fix it, also alot easier to take it out  :)