For TS3 there's mods out there where you don't have to empty the potty and learning their skills such as walking and talking and potty training is sped up. I'm looking for a mod like that for Sims 2! I know there is a picture thing to make them learn instantly but I just want a mod that speeds up the time they learn the skill, make them learn those skills faster. Anyone know where I can find one? Or possibly can make that?

The potty mod is here: http://www.simbology.com/smf/index.php?topic=10.0

Using smart milk will work for the others or use the batbox to 'make me smart'

You have what you need in game. Give the parents a date so they have gold to platinum aspiration. Then go into aspiration rewards. (you do need enough points) get a container of smart milk and a thinking cap. The sims must be gold or higher aspiration to use these things but since they just were from a date it should be fine. The adult wears the thinking cap and give the toddler the smart milk. I can do all three skills within 1-2 days tops. Also with potty training the trick is go to speed one wait for the parent to pat the toddler on the head, then click cancel training on the parents queue. Not on the toddlers just the parent. the parent is then free to go do other things and the toddler will stay on the potty. make sure the toddler is not very tired, hungry or low fun, if they are they won't go potty. if you use that combo of smart milk and thinking cap training can go very fast, way faster than sims 3 toddler training. To be even faster change the season to autumn and they will be be done all of it in a day or less.
Edit:Mod already posted.

InSimenator has a function called the Toddler Trainer, which can give all the skills

@Lord St.Croix does it come with the memories?

I don't remember; it's been a while since I used it

Twojeffs Sim Blender has (under skills) the option to give the toddler skills (you can do each one individually or all of them in one shot). It fills the wants and gives the memories of learning them. One of the parents will get memories for teaching them (one parent may get the teaching to use the potty while the other may get the one for walking) and if the parent has the want to teach, it gets filled.

I was also suggesting the blender, but Jo's way is more fun

Re. the insimenator toddler trainer:
There are 4 toddler skills that you can add or remove: Walk, talk, potty and nursery rhyme.
With the first three you also get the option to adjust the skilling progress (looks like the 'buy groceries' window), so you can speed the learning process up but still have a sim teach the toddler and give them a proper memory.
Nursery rhyme doesn't have that option, only 'add' or 'remove'. Simply adding it won't give you a memory, so you might either add it in SimPE or teach it the regular way, smart milk and patience.