I really don’t know what to suggest other than just hope they’ll grow out of it sooner rather than later.

Ask them to use their ‘indoor voice’ and speak at a lower volume than him

I suggest you have him visit a Child Psychologist. He may be making these sounds to create sound stimulation. This is often an indication of autism. The earlier this is diagnosed or ruled out you will learn how to stop this behavior.

Masking Tape? Sock in mouth? Lol just joking. Best way is to ignore it besides its very good for their lungs and makes them stronger.

Ohhh how i wish i knew the answer to this. Mine is 3.5 and still does it!!!! But now its even louder. hahah. Will read some of the other answers.

My little 5 1/2 month old does this too – I think it’s cute. I probably won’t find it so cute if he keeps it up for years – but I won’t be spraying him with water!

My daughter is 4 and still does it. It drives me mad and is embarrassing when we are at the shops. Tried everything to stop her but I guess she will when she’s ready

Hope this has been resolved for you.

how did you go?

He is just finding his voice – these are all just new noises. With mine I would give her another noise to make when the squelling was out of my patience range and that seemed to help.

Have you had any success in stopping the squealing?

Hope some of the advice below has helped

haha drives me mad too. ear plugs may help

My son enjoyed doing this in the bathroom-good acoustics in there.

It just means there having fun!

Say in a very firm voice STOP and then tell him it is quiet time and the noise hurts your ears.Do this every time he screams.Children need to be taught what is acceptable and what is not

oh god you still have so long to go my boy is four and he still does its that bad that sometime i have to walk outside of my house just to get away from it

My grand daughter does this Now moms not everyone is going to agree but at my home when she does it I squirt her with a water bottle . Omg the first time I squirt it was because I had just done her sisters hair and the bottle was there. Wow she stop looked at me and tried it agin. Squirt … She stop pled for a few hours and tried the loud stealing again squirt .. Now she knows I have the water bottle in view… My daughter asks mom she does not do it at your house and I told her .. I thought here goes I,m in for it……. Now she did it for two days no more high pitch squealing .. Yes she still crystal but we know something is wrong… She was squealing when she wanted her own way to. Water bottle on view with a NO. Not for you …. …

Thanks heaps ! Wondering this myself.

Hope everything worked out in the end