I was just fooling around one day and figured this out
I don’t think it should be played on bass but whatever

G-0-0---------------------------------------------------------------------------------------------
D------12-12--14-14-12-10-10-9-9-7-7-5---12-12-10-10-9-9-7----12-12-10-10-9-9-7
A--------------------------------------------------------------------------------------------------
E--------------------------------------------------------------------------------------------------


G-0-0---------------------------------------------------------------------------------------------
D------12-12--14-14-12-10-10-9-9-7-7-5---------------------------------------------------
A--------------------------------------------------------------------------------------------------
E--------------------------------------------------------------------------------------------------


For those who want to play twinkle twinkle little star on bass there it is.