baby, pointing at the light fixture over the table and signing "on": o.*

my sister: we actually can't turn that light on right now, because the lightbulb inside is burnt out! it needs a new one.

baby: ighbu.

sister: yes, lightbulb! granddaddy said after we eat he's going to climb up there on a ladder and change it, and then the light will come on!

baby: gadada! adda, uuu! ighbu o!

sister: exactly!

baby, signing "on" and pointing at the light and then my dad, with increasing urgency: GADADA ADDA UUUU. O.

my sister: we're going to finish eating first though, ok?

baby: nonono. O. gadada adda uuu.

[a split second goes by]

baby, pointing to himself: ba. adda uuu. ighbu.

me: you're going to climb the ladder and change the lightbulb yourself?

baby: dzyeah. *pointing to the buckle where he is buckled into the high chair* ububu.

me: unbuckle you? so you can change the lightbulb?

baby, highly businesslike: dzyeah.