  We build a toy model where the central object, i.e., a newly born neutron
star or a black hole, launches jets at late times and show that these jets
might account for peaks in the light curve of some peculiar (i.e., having
unusual light curves) core collapse supernovae (CCSNe) when the jets interact
with the CCSN ejecta. We assume that the central object accretes fallback
material and launches two short-lived opposite jets weeks to months after the
explosion. We model each jet-ejecta interaction as a spherically symmetric
`mini explosion' that takes place inside the ejecta. We assume that each `mini
explosion' adds emission that is symmetric in time around the late peak, and
with a rise in emission power that has the same slope as that of the main CCSN
light curve. In total we use 12 parameters in the toy model. In our toy model
late jets form stronger emission peaks than early jets. Late jets with a
kinetic energy of only about one percent of the kinetic energy of the CCSN
itself might form strong emission peaks. We apply our toy model to the
brightest peak of the enigmatic CCSN iPTF14hls that has several extra peaks in
its light curve. We can fit this emission peak with our toy model when we take
the kinetic energy of the jets to be about one to two percent of the CCSN
energy, and the shocked ejecta mass to be about three percent of the ejecta
mass.
