I have a problem with my kids bumping into the knobs on the gas stove and turning on the gas. Is there a way to lockout the knobs so this will not happen anymore?

You should be able to pull the knob straight out. Don't lose the internal sleeve. Here is a quick DIY video. https://www.youtube.com/watch?v=NSChe0uwRvA

Or you can put some Loctite glue in the cracks on both sides before you tighten the zip Just to strenghten this in case it gets bumped again.

The key is a lockout symbol. It appears when you set the oven to child lock mode ( Stops kids from opening the door and getting burnt) or when the oven gets over a certain temperature. (Stops you getting burnt) If you from have the instruction manual, it is xa bit difficult. You usually have to npress and hold 1 or more of the buttons in for a few seconds to unlock. I'm not sure which ones on your oven.

There isn't much you can do to the stove outside of buying a stove that has standing pilots or shutting off the gas each time you leave the kitchen. This is a problem with the pilotless design. If the knob isn't turned far enough the activate the spark switch, gas can escape without being lit. Vigilance is your only answer outside of the solutions suggested.

You didn't say whether you have a gas or electric oven, or oven & stove. I'll assume you have a stove, just to cover all bases.

First, you should shut down the oven: a gas stove will have a valve on the gas line behind the stove. The valve will either have a red handle or a flat stem that usually has a hole in it. Turn either valve 1/4 turn to shut off gas, use a wrench on the flat stem. An electric stove should be shut off by flipping off the double circuit breaker for it in your electric panel. Do not unplug an electric stove when it is on; this can damage the plug &/or electrocute you.

Most likely the inside of the knob has stripped out. Look at the knob for a hole that has a setscrew in it: a small allen wrench or screwdriver will loosen the setscrew, most knobs don't have them and will pull off. Be careful to use even pressure on two sides of the knob; if you can't pull it off, use two butter knives or flat screw drivers to pry it up enough to get a grip on it.

Look at the center stem on the back of the knob, it will likely be cracked or stripped. Some stems have a D-shaped metal insert that strips out inside the plastic stem. If you have one, pull off a burner knob and compare the stems in the back, if they are the same size, put the burner knob on the shaft for the oven control, and use that knob to turn the oven control off.

If the burner knob won't fit, use your fingers or a pair of pliers (gently) to turn off the oven control shaft. If the shaft stops normally, you can turn the stove back on using either the gas valve or the circuit breaker. If you have a gas stove that doesn't have electric ignition (a clicking noise when you turn on a burner) you may need to re-light the pilots for the burners. Lift the covers off the burners to re-light the pilots.

If you have succeeded in turning off the oven, you need a new knob -- you can get one at an appliance parts store or maybe a hardware store. If the oven control did not turn off normally, I would leave the oven/stove turned off: the control itself will need to be replaced by a qualified repair person.

http://www.goedekers.com/assets/PDF/FiveStar/ttn6257-manual.pdf
How to Replace Knobs on Gas Stove Gas Stoves Ovens

How to Fix Knob on Gas Stove DIY Removing Stuck Knob Without breaking switch shaft

on most stoves where gas line connects around back should be a gas shut off valve if none put one on

To lock/unlock the controls: Turn all surface burners off.

Touch and hold the GAS/CONTROL LOCKOUT pad for 3 seconds until the display shows LOC.

To unlock the control, touch and hold the GAS/CONTROL LOCKOUT pad for 3 seconds until LOC disappears from the display.

The safest thing to do would be to turn off the power ( un-plug it or turn off the breaker) or the gas or both to the unit. Turning off the power would probably be easier. There should be a gas shut off valve behind it.

You can use either a rolled up newspaper to stop the dog or go to this site for child safety items.

http://www.123safe.com/cgi-bin/SoftCart.exe/scstore/p-1032332AK.html?E+scstore

http://www.shop.com/+-a-child+locks+for+gas+stove+knobs-p127480814-g1-k24-st.shtml

http://www.kidproteq.com/Home-Safety/Kitchen-Safety/Clear-View-Stove-Knob-Covers-p189.html

I have a GE Gas Stove XL44 the stove top buners don't light by themselves without manual lighting. When I turn on the buner knob the buner doesn't click. Also I used my self- cleaning oven for the first time and stopped it before the time was up after that is when the stove top buners wouldn't light by theirselves.