Is it normal for a 11 year old to eject jelly out from the penis?

Yes it is normal because puberty usually starts around then.

Puberty may start at this age or even younger in some boys. Most commonly it begins around 12-years-old but it is different for everyone.

Once puberty has begun the boy will discover masturbation, ejaculation and orgasms. It is normal for boys to masturbate, and when they do this they will achieve an orgasm, and if advanced somewhat into puberty they may ejaculate semen and sperm. The jelly you mention is probably the semen. It is usually white or creamy in color and sticky.