You need pressure for absolute 220 degrees or above of boiling. No matter how long you boil things are high altitude, it will not reach 220 (sea level open kettle boiling temperature)

Longer time may or may not kill most microbes. Some only die at or near boiling, which is reached too low to kill some microbes at high altitudes. In that situation, a chemical cleanser PLUS boiling may be helpful. Of course, you can't boil or autoclave toys with electronic parts. I would recommend 10% bleach solution, or a hospital cleanser with bleach called Dispatch, or Cavacide (the stuff that makes doctor's offices smell so sexy.)

Dispatch, which is a specialized 10% bleach spray claims with proof: Germicidal Efficacy: 30 Seconds: Mycobacterium tuberculosis (TB). One Minute: Acinetobacter baumannii, Avian Influenza A, Canine Parvovirus, Enterobacter aerogenes, Escherichia coli ESBL, Feline Panleukopenia Virus, Hepatitis A Virus (HAV), Hepatitis B Virus (HBV), Hepatitis C Virus (HCV), Herpes Simplex Virus (HSV-2), Human Immunodeficiency Virus Type 1 (HIV-1), Influenza A Virus, Klebsiella pneumoniae, Methicillin resistant Staphylococcus aureus (MRSA), Norovirus, Poliovirus Type 1 (Mahoney), Pseudomonas aeruginosa, Rhinovirus, Rotavirus, Salmonella enterica (formerly choleraesuis), Staphylococcus aureus, Streptococcus pyogenes, Trichophyton mentagrophytes (Athlete’s Foot Fungus), Vancomycin resistant Enterococcus faecalis (VRE)

Cavacide claims with proof synergistic combination of alcohol and quaternary ammonium. It is a convenient ready-to-use intermediate-level disinfectant which is effective against tuberculosis, viruses (hydrophilic and lipophilic), bacteria (including MRSA and VRE) and fungi. less